It is an E4. It still says Schick Injector and the flaps are gone from the spring. Gs say Eversharp Schick. I can make a new handle for that beast if you like. Just PM me.
No, it's a G1.... but a very early one from when they were still using left-over E parts. Personally, I'm more of a fan of the later G versions.
Yep. Butterscotch E2 is my go-to injector. Lots of guys say it's aggressive but I only feel efficiency.